Reviews of a film, game or series usually appear at the same moment rather than gradually. That synchronisation is agreed in advance, and the timing carries information of its own.
The embargo is a condition of early access
Critics receive material before the public does, through screenings, review copies or press events, and access is granted on the condition that nothing is published before a stated time.
The arrangement is enforced by access rather than by law, since an outlet that breaks an embargo risks losing invitations to future releases from that distributor.
Both sides gain something. Critics get time to watch and write properly, and the distributor gets coverage that arrives when it is most useful commercially.
Simultaneous publication concentrates attention
Reviews trickling out over weeks produce a diffuse conversation that never becomes an event, and early pieces would be forgotten before the release they discuss.
A single lift moment creates a visible burst of coverage, which is far more likely to reach people who were not already looking for it.
The date itself is a signal
An embargo lifting well before release generally indicates confidence, since a distributor expecting good reviews wants them working as marketing for as long as possible.
A late lift, particularly one falling on the day of release or after the first public screenings, suggests the opposite and is widely read that way inside the industry.
The absence of press access entirely is the strongest version of the same signal, and audiences have learned to interpret it without needing anyone to explain it.
Conditions often go beyond timing
Agreements can specify which plot details may be discussed, prohibit describing certain sequences, or set separate dates for social reactions and full written reviews.
Games add technical conditions, since a review copy may lack the launch update, and outlets frequently note that a version tested was not the version players will receive.
Where the system is under strain
Short reactions posted immediately after premieres have effectively created an earlier, looser tier of coverage that is enthusiastic by construction and precedes any considered assessment.
Audience impressions also now appear from public previews before any embargo lifts, which means the first widely seen verdict often comes from outside the arrangement entirely.
Distributors have responded by shortening the gap between the lift and release rather than abandoning the practice, since the coordination is still worth more than the control it has lost.